海洛因地理来源研究进展

对海洛因地理来源的判断一直是世界各国较为关注的问题。本文主要从技术角度出发,结合作者与美国缉毒署(DEA)特殊样品检测和研究实验室(STRL)进行技术交流的情况,对最近30年世界各国对海洛因来源判断研究的分析方法和数据处理方法进行了综述和探讨。     

The consequences of respondent attrition in panel studies: A simulation based on the Rochester youth development study

Subject attrition is a potentially serious threat to the validity of inferences drawn from panel studies of delinquency and drug use. Prior assessments of this issue produce somewhat conflicting results, with some finding that respondents who leave the panel have higher rates of delinquency and drug use than those who remain, while other studies report little or no differential attrition. Despite these findings, there has been virtually no examination of the extent to which respondent attrition can bias substantive findings in panel studies of delinquency and drug use. The present article addresses this issue by simulating higher levels of attrition in an ongoing panel study that has a low rate of attrition and little differential attrition. It finds that failure to include more elusive respondents (those who are more mobile) would bias estimates of prevalence and frequency of delinquency and drug use as well as results from basic regression analyses. Failure to include less cooperative respondents (those who require more contacts) produces similar, but somewhat smaller, differences. The methodological implications of the results are discussed.     

The squatting facet on femora of West Coastal Indian population

104 out of 108 adult femora from the West Coastal region of India show a distinct identifiable squatting facet on their popliteal surface. The data on such features are reviewed and its relevance to medico legal and anthropological science is discussed.     

A Note on the Use of County-Level UCR Data

County-level crime data have major gaps, and the imputation schemes for filling in the gaps are inadequate and inconsistent. Such data were used in a recent study of guns and crime without considering the errors resulting from imputation. This note describes the errors and how they may have affected this study. Until improved methods of imputing county-level crime data are developed, tested, and implemented, they should not be used, especially in policy studies.     

“上有政策,下有对策”作为错误行为的前提分析——关于一种纵向政治关系合理性的探讨

纵向政治关系是靠推行和执行政策来构成的,其合理性制约着政治的效能。“上有政策,下有对策”具有必然性、普遍性,但作为错误行为则是有条件的,实践中不加分析地给予全盘肯定或全盘否定都是有害的。要稳定政局,维系、发展、提升纵向政治关系,就必须确保纵向政治关系的合理性,特别是保证政策的合理性,尽可能防止或及时纠正政策的不合理性。     

论“虚拟财产”

虚拟财产是在网络环境下以电子数据为载体的财产,是个人财产的一种特殊形式,它具有传统财产的法律属性.法律对虚拟财产的保护有利于现代财产制度的完善和健全,从而促进社会的稳定和发展.     

胃脘痛证候的聚类分析及因子分析研究

目的 采用聚类分析及因子分析的数据挖掘方法,对胃脘痛的中医临床证候及四诊信息进行研究。方法 收集640例755诊次胃脘痛病例,记录症状、舌象和脉象等临床资料,对临床资料进行聚类分析及因子分析。结果 胃脘痛临床证候可分为六类:脾胃虚寒、肝气犯胃、湿热中阻、脾胃气虚、痰湿内蕴、瘀血停胃,每一类证候对应贡献率不同的特异的四诊信息。结论 胃脘痛有特异的证候分类及四诊信息,通过数据挖掘方法深入研究,对胃脘痛的规范化诊断提供了有效的数据支持,能提高辨证准确性。     

江苏环境库兹涅兹曲线形状研究——基于面板数据模型

该文分析了江苏省1999年至2009年各市GDP数据与各市环境污染三废数据的关系,提出江苏省环境污染情况并不完全符合环境库兹涅兹曲线。该文采用面板模型对苏南、苏中、苏北的三废污染数据与经济增长水平的数据的关系曲线进行分析描绘,结果发现在江苏三大区域九种经济与三废污染的关系曲线形状中,有的呈现“N”型,有的呈现“-”型,有的呈现“S”型,总体并无特定规律。研究结果表明,江苏省经济发展情况与三废污染之间有其自身的特点,因此,在经济发展过程中要采取切合实际的措施,在推动经济发展的同时注意保护环境。     

Does social capital increase public support for economic globalisation?

The dominant explanation of public attitudes vis‐à‐vis economic globalisation focuses on re‐distributional implications, with an emphasis on factor endowments and government‐sponsored safety nets (the compensation hypothesis). The empirical implication of these theoretical arguments is that in advanced economies, on which this article focuses, individuals endowed with less human and financial capital will be more likely to experience income losses. Hence they will oppose economic openness unless they are compensated by the government. It is argued here that including social capital in the analysis can fill two gaps in explanations relying on factor endowments and the compensation hypothesis. First, generalised trust – one key aspect of social capital – constitutes a personal endowment alongside human and financial capital. Second, structural social capital – another key aspect of social capital – can be regarded as a nongovernmental social safety net that can compensate for endowment‐related disadvantages of individuals. Both aspects of social capital are expected to contribute, for distinct reasons, to more positive views on economic openness. The empirical testing relies on survey data for two countries: Switzerland and the United States. For both countries, the results indicate that generalised trust has a strong, positive effect on public opinion of economic globalisation, whereas structural social capital has no effect.     

高校数据云存储的实践

随着"数字校园"建设的深入,许多学校都已经建立或正在筹建自己的校园信息系统。但是,仅仅拥有一流的硬件设备和先进的管理软件肯定是不够的,还需要大量的教育信息资源。这就需要大容量的存储设备。而随着"云计算"所带来的信息化革命,高校将逐步建立各自的"私有云",在学校内部实现"云存储"。